fix version in build worflow

.github/workflows/build-release.yml

@@ -10,6 +10,10 @@ jobs:
         runs-on: ubuntu-latest
 
         steps:
+          - name: Get the version
+            id:   get_version
+            run:  echo ::set-output name=VERSION::$(echo $GITHUB_REF | cut -d / -f 3)
+            
           - name: checkout
             uses: actions/checkout@v2
     
@@ -19,7 +23,7 @@ jobs:
               go-version: '1.13.0'
         
           - name: Build
-            run:  make -j $(nproc) compile VERSION=${{ github.ref }}
+            run:  make -j $(nproc) compile VERSION=${{ steps.get_version.outputs.VERSION }}
             
           - name: create release
             id:   create_release
@@ -27,8 +31,8 @@ jobs:
             env:
                 GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
             with:
-                tag_name: ${{ github.ref }}
-                release_name: Release ${{ github.ref }}
+                tag_name: ${{ steps.get_version.outputs.VERSION }}
+                release_name: Release ${{ steps.get_version.outputs.VERSION }}
                 draft: false
                 prerelease: false